chore: change unit test for random

Author: Shinigami92

src/mersenne.ts

@@ -44,6 +44,3 @@ export class Mersenne {
     this.gen.init_by_array(A, A.length);
   }
 }
-
-export default Mersenne;
-module.exports = Mersenne;

test/random.unit.js

@@ -3,7 +3,7 @@ if (typeof module !== 'undefined') {
   var sinon = require('sinon');
   var _ = require('lodash');
   var faker = require('../index');
-  var mersenne = new (require('../lib/mersenne'));
+  var mersenne = new (require('../lib/mersenne').Mersenne);
 }